Question about Audio Players & Recorders
Any idea where i could order a transformer with number TTI230010120 or can I use a similar type this being a 230v/100w but what is the secondary voltage ,.It has three wires obviously centre tapwith twowhat I think is 12v output
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Posted on Jan 02, 2017
The clock works off the frequency (hertz). In US the electrical wave frequency is 60HZ/sec and in India and many other countries 50HZ/sec. Hence, the clock slows down about 6 seconds or so every minute.
Posted on Nov 28, 2007
Power Plus Online sell a replacement ac adapter 'PSU 1' at www.power-plus.tv we purchased one recently for £29.95 and this works fine.
Posted on Dec 30, 2008
Everyone has problems with SMPSs; mine started in 1971 when IBM was first using them; they were literally blowing up and throwing molten copper several feet.
Anyhow, if you have the benefit of a capacitance meter with DF function, check the main filter caps all of the smaller caps. The quality and durability of electrolytics is bad and getting worse and once one of these fails anywhere in a feedback path, the supply will not start. HF is hell on electrolytics.
The (ferrite) transformer in a switcher measures very low on the Ohms scale; depending on power handling and service frequency, primary <<100 Ohms, secondary from 0.? - 10 Ohms between taps, because they operate at higher frequencies. The 50 volts from the diode bridge is way too low; you probably have failed 100-200 uFd. electrolytics right close to them although this is fairly rare since they are only working with 120 Hz. From a 120 VAC line, you should have ~ 160-170 DC volts at no load if the caps are still working as they should and you have no notable resistance between the AC and the diodes.
Well-designed switchers are wonderfully efficient and very reliable if the maker didn't cheat on component quality. I've repaired literally thousands as a sideline in a now retired business and after studying them and adding a ceramic cap.or two and better quality electrolytics, they will run for decades. At one time, I had standard repair prices on ~ 70 different models.
My guarantee was 'lifetime' and that was limited only because I retired.
Posted on Aug 20, 2009
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